/usr/share/applications/itweb-settings.desktop is in icedtea-netx-common 1.6.2-3.1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | [Desktop Entry]
Name=IcedTea Web Control Panel
Comment=Configure IcedTea Web (javaws and plugin)
Exec=/usr/bin/itweb-settings
Icon=javaws
Terminal=false
Type=Application
Categories=Settings;
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